We run after PEI, so we need to AddPristinesAndCSRs.
In practice, that makes no difference here, because we only ask about
liveness of super-registers of defined GR8/GR16 registers, so they
can't be pristine. Still, it's the correct thing to do.
Thanks to Quentin for noticing!
Follow-up to r267495.
llvm-svn: 267658
// Start computing liveness for this block. We iterate from the end to be able
// to update this for each instruction.
LiveRegs.clear();
- LiveRegs.addLiveOuts(&MBB);
+ // We run after PEI, so we need to AddPristinesAndCSRs.
+ LiveRegs.addLiveOuts(&MBB, /*AddPristinesAndCSRs=*/true);
for (auto I = MBB.rbegin(); I != MBB.rend(); ++I) {
MachineInstr *NewMI = nullptr;